Show Bett Better r Understanding ding of of Physiology 1 Gained From Window WIndo in In Rabbits Rabbit's s Ear j I l CINCINNATI Ohio April 27 55 SS Looking through h II window in a arab arab- rabbits rabbit's rob rab bits bit's car ear University of physiologists have gained a better understanding c how the body disposes disposes dis poses of debris cast out of the blood vessels This has been beers one of the important problems still unsolved by physiologists Drs E E. R. R Clark and E. E L. L clark lark reported their observations at a meeting meet meet- ing here of the Federation of American Ameri Airier can Societies for lor Experimental Bi Lymphatic tissue has been credited with doing this scavenging job ob appears to be much less important tant ant in this r relation laUon than previously thought nought the darks Clarks study showed Enzymes which digest protein substance sub sub- stance lance may play a role in the caging nging process process it was suggested The window in the rabbits rabbit's car ear was devised several years ago at the Uni Uni- of Pennsylvania laboratories It IL t S a sort of ot double window composed composed com corn posed of two thin sheets of ot transparent ent nt substance with the space between thin hin enough so that light can pass through the tissues that grow into it The scientists use a a microscope pe to look ook through this window and watch what goes on in blood vessels the blood itself the connective tissue and other kinds kind of living Jiving material As new blood vessels and connective connective connee- connee tive tissue cells grow Into the double window the central portion is always filled with blood cells celIS fibrin and blood plasma the Clarks Clark observed d. d This mass is completely walled in by new growing tissue which fills ills the chamber or window from top to bot opt opt- torn tom om and permits no escape In spite of the absence of the lymphatic tissue or vessels which might carry off ot the debris and with no outlet except by byway byway byway way of the tiny blood vessels this central moss mass clears up rapidly and the he debris all disappears The space it t occupied is filled up with small blood vessels and connective tissue Some of th the mass may b be taken up by macrophages large cells which are known to lo be scavengers But most of it is disposed of in let some other way Whether it is first digested b by r enzymes or in some other way converted converted con con con- 1 into compounds that can be s absorbed by bythe the blood Is not lc known c ow own Observations through the window showed that it can can only leave the tissues Us sues in the window chamber hamber by way of the small blood vessels there being being be be- ing no lymphatic vess vessels ls to t take ke it U away 1 I. I I. I |